Slow Cooker Short Rib Ragu with Horseradish Gremolata

Bahan-bahan (6 porsi)

• 2 tablespoons oil
• 4 pounds bone-in short ribs
• Kosher salt and black pepper, to taste
• 1 shallot, minced
• 1 cup dry red wine
• 6 tablespoons butter
• 1 (28 ounce) can crushed tomatoes
• 1 (28 ounce) can whole peeled tomatoes, crushed with your hands
• 1 tablespoon beef base
• 1 sweet onion, finely chopped
• 1 head garlic, cloves peeled and separated
• 1 carrot, cut into large pieces
• 1 bay leaf
• 2 sprigs rosemary
• 2 sprigs parsley
• 2 sprigs thyme
• 1/4 cup fresh parmesan cheese, plus more for topping
• 1 teaspoon crushed red pepper
• 1 ½ cups parsley, coarsely chopped
• Grated zest of 1 small lemon
• 3 tablespoons fresh, coarsely grated horseradish
• Pappardelle pasta (or zucchini noodles, or polenta), to serve